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A spectral-efficient 1 Tbps terrestrial free-space optics link based on super-channel transmission

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Abstract

We propose a novel 1 Tbps super-channel terrestrial free-space optics (FSO) link using nine distinct Nyquist-wavelength division multiplexed (WDM) sub-carriers with 14 Gbaud symbol rate. Nine independent 112 Gbps polarisation multiplexed-16-quadrature amplitude modulated data streams are transported over each sub-carrier. Further, the sub-carriers are Nyquist-spaced using pre-filter with 15 GHz bandwidth, which is approximately equal to symbol rate. Through numerical simulations, we investigate the transmission range performance for varying attenuation levels due to external climate conditions. Bit-error rate (BER), optical signal to noise ratio (OSNR), and error vector magnitude (EVM %) are used as the evaluation metrics. The proposed Nyquist-WDM FSO transmission link demonstrates 7.46 bits/sec/Hz 1 Tbps information transmission. The proposed link exhibits large-bandwidth capacity to efficiently carry high-speed data for next generation long-haul optical wireless networks.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Saveetha Engineering College, Chennai, India

    V. Samuthira Pandi

  2. Department of Electronics and Communication Engineering, Satyam Institute of Engineering and Technology (IKG-PTU, Kapurthala), Amritsar, India

    Mehtab Singh

  3. Department of Engineering and Technology, Guru Nanak Dev University, Regional Campus, Jalandhar, India

    Mehtab Singh & Jyoteesh Malhotra

  4. Department of Electronics and Communication Engineering, Shaheed Bhagat Singh State Technical Campus, Ferozepur, India

    Amit Grover

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  1. V. Samuthira Pandi
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  2. Mehtab Singh
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  3. Jyoteesh Malhotra
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  4. Amit Grover
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Correspondence to Mehtab Singh.

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Pandi, V.S., Singh, M., Malhotra, J. et al. A spectral-efficient 1 Tbps terrestrial free-space optics link based on super-channel transmission. Opt Quant Electron 53, 252 (2021). https://doi.org/10.1007/s11082-021-02931-x

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